document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=1201683>Question 1201683</A>: <I><SPAN STYLE=\"word-break: break-all;\"> 1. ~N⊃ [(B ⊃ D) ⊃(N v~E)] 2. (B ⊃ E) ⊃ ~N 3. B ⊃ D 4. D ⊃ E / ~D </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #836164 by </B><A HREF=/tutors/aboutme.mpl?userid=math_tutor2020><B>math_tutor2020(3817)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=math_tutor2020><IMG SRC=http://www.algebra.com/images/aboutme-small.gif BORDER=0 alt=\"About Me\" VALIGN=MIDDLE></A>&nbsp;<IMG SRC=http://www.algebra.com/images/nopicture.jpg><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=836164\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> <font color=black size=3><BR>\n" );
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document.write( "<tr><TD >Number</TD><TD >Statement</TD><TD >Lines Used</TD><TD >Reason</TD></tr><tr><TD >1</TD><TD >~N -> [ (B -> D) -> (N v ~E) ]</TD><TD ></TD><TD ></TD></tr><tr><TD >2</TD><TD >(B -> E) -> ~N</TD><TD ></TD><TD ></TD></tr><tr><TD >3</TD><TD >B -> D</TD><TD ></TD><TD ></TD></tr><tr><TD >4</TD><TD >D -> E</TD><TD ></TD><TD ></TD></tr><tr><TD >:.</TD><TD >~D</TD><TD ></TD><TD ></TD></tr><tr><TD >5</TD><TD >B -> E</TD><TD >3,4</TD><TD >Hypothetical Syllogism</TD></tr><tr><TD >6</TD><TD >~N</TD><TD >2,5</TD><TD >Modus Ponens</TD></tr><tr><TD >7</TD><TD >(B -> D) -> (N v ~E)</TD><TD >1,6</TD><TD >Modus Ponens</TD></tr><tr><TD >8</TD><TD >N v ~E</TD><TD >7,3</TD><TD >Modus Ponens</TD></tr><tr><TD >9</TD><TD >~E</TD><TD >8,6</TD><TD >Disjunctive Syllogism</TD></tr><tr><TD >10</TD><TD >~D</TD><TD >4,9</TD><TD >Modus Tollens</TD></tr>\n" );
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document.write( "I used arrows in place of the horseshoe symbols.\r<BR>\n" );
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document.write( "For more information, check out the various rules of inference and rules of replacement as shown in the link below.<BR>\n" );
document.write( "<a  rel=nofollow HREF= \"https://logiccurriculum.com/2019/02/09/rules-for-proofs/\">https://logiccurriculum.com/2019/02/09/rules-for-proofs/</a>\r<BR>\n" );
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